VI 
Index. 
PAGE 
Priestley, J. H., and Pearsall, W. H. — Growth Studies. III. A c Volumometer ’ Method of 
measuring the Growth of Roots. With one Figure in the Text .... 485 
Redfern, Gladys M. — On the Absorption of Ions by the Roots of Living Plants. I. The 
Absorption of the Ions of Calcium Chloride by Pea and Maize . . . .167 
<■ On the Course of Absorption and the Position of Equilibrium in the 
Intake of Dyes by Discs of Plant Tissue. With eight Figures in the Text . . 51 1 
Ridler, W. F. F. — The Fungus present in Pellia epiphylla, (L.) Corda. With eight Figures 
in the Text .............. 193 
Salisbury, E. J. — The Soils of Blakeney Point : A Study of Soil Reaction and Succession in 
Relation to the Plant Covering. With Plate XV and five Figures in the Text . . 391 
Saunders, Edith R. — The Leaf-skin Theory of the Stem : A Consideration of certain 
Anatomico-physiological Relations in the Spermophyte Shoot. With thirty-four 
Figures in the Text 135 
Sharples, A., and Lambourne, J. — Observations in Malaya on Bud-rot of Coco-nuts. With 
Plates I- VII . 55 
Singh, Kharak. — D evelopment of Root System of Wheat in Different Kinds of Soils and 
with Different Methods of Watering. With three Figures in the Text . . . 353 
Sinnott, E. W., and Bailey, I. W. — The Significance of the ‘ Foliar Ray’ in the Evolution 
of Herbaceous Angiosperms. With Plates XVIII and XIX and one Figure in the Text 523 
Smith, Edith Philip. — A Note on Conjugation in Zygnema. With Plate XII and two 
Figures in the Text .............. 301 
Thoday, D. — On the Organization of Growth and Differentiation in the Stem of the Sun- 
flower. With Plate XVII and ten Figures in the Text ...... 489 
Turrill, W. B. — Abnormal Flowers in Eranthis. With twelve Figures in the Text . . 131 
Williams, Maud. — On the Influence of Immersion in certain Electrolytes upon Cells of 
Saxifraga umbrosa. With three Figures in the Text ...... 563 
W t illiamson, Helen Stuart. — S ome Experiments on the Action of Wood on Photographic 
Plates. With Plate XI 91 
Woodburn, William Logan. — S permatogenesis in Asterella hemisphaerica, Beauv. With 
Plate XX 535 
Wormald, H. — Further Studies of the ‘Brown Rot’ Fungi. I. A Shoot-Wilt and Canker 
of Plum Trees caused by Sclerotinia cinerea. With Plates XIII and XIV . . 305 
B u LIST OF ILLUSTRATIONS. 
a. Plates. I-VII. 
VHI-X. 
XI. 
XII. 
XIII, XIV. 
XV. 
XVI. 
XVII. 
XV11I, XIX. 
XX. 
XXI. 
Bud Rot (Sharples and Lambourne). 
Sporocarpon (McLean). 
Action of Wood (Williamson). 
Zygnema (Smith). 
Shoot-wilt (Wormald). 
Blakeney Point (Salisbury). 
Botrychium (Campbell). 
Stem of Sunflower (Thoday) 
Foliar Ray (Sinnott and Bailey). 
Spermatogenesis (WOODBURN). 
Endolithic Lichens (Fry). 
b. Figures. 
1. Comparison of change in moisture- content of the same area of powdered soil and 
Pleurococcus naegelii in relation to atmospheric humidity (Fritsch) . . ■ 7 
2. a , b , Pleurococcus naegelii. c-g , Hormidium stage of Prasiola crispa (Fritsch) . 10 
1. Barley plant (Jackson) ........... 22 
2. Transverse section of young branched root (Jackson) 24 
